A Fourth Dimensional Bong Hit is just
like every other bong hit, with the difference being as follows:- <A> you
haven't slept in 4 days, <B> someone has packed it with hash crumbs or
oil without your knowledge, <C> you only smoke spliffs and you've been peer pressured into having a hit from a
bong, <D> You've only just been able to get some green, but have had to
go without for a long time (if you're a daily smoker).
Generally it is marked by a vivid blue exhale that lasts several breaths, and many coughs and splutters. Probably the cause of the term "Young Lung".